Question

how many three digit natural numbers are divisible by 5​

Answer 1

Answer:

Three digit number are 100,105.........995

a=100 (a= first term)

d=105−100=5 (d=common difference)

⇒a

n

=a+(n−1)d

⇒995=100+(n−1)5

⇒995−100=(n−1)5

⇒

5

895

=n−1

⇒179=n−1

⇒n=179+1

⇒n=180

Hence,

180 three digit natural number are divisible by 5

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Answer 2

100,105,....995

hope this helps you